diff --git a/system/HTTP/ResponseInterface.php b/system/HTTP/ResponseInterface.php
index 827eea44e298..382a2847c503 100644
--- a/system/HTTP/ResponseInterface.php
+++ b/system/HTTP/ResponseInterface.php
@@ -210,7 +210,7 @@ public function setContentType(string $mime, string $charset = 'UTF-8');
     /**
      * Converts the $body into JSON and sets the Content Type header.
      *
-     * @param array|string $body
+     * @param array|object|string $body
      *
      * @return $this
      */